public class Client {
public static void main(String[] args) {
        PurchaseRequest Request = new PurchaseRequest("1", 50000);

        DepartmentApprover departmentApprover = new DepartmentApprover("成主任");
        ColleageApprover colleageApprover = new ColleageApprover("李院长");
        ViceSchoolMasterApprover viceSchoolMasterApprover = new ViceSchoolMasterApprover("阮副校长");
        SchoolMasterApprover schoolMasterApprover = new SchoolMasterApprover("张校长");

        departmentApprover.setApprover(colleageApprover);
        colleageApprover.setApprover(viceSchoolMasterApprover);
        viceSchoolMasterApprover.setApprover(schoolMasterApprover);
        schoolMasterApprover.setApprover(departmentApprover);

        departmentApprover.handleRequest(Request);
        }
        }
